Thesis On Microalgae

Thesis On Microalgae-35
From this work, there is clearly significant benefit to using advanced processes for oil extraction such as HTL or microwave enhanced processing.Compared to other parts of the extraction process, such as energy used for drying, the use of a microwave has been shown to be economically viable.

Efficient treatment of wastewaters is essential as wastewaters contain environmentally harmful substances, such as biodegradable organics, nutrients, metals and pathogens.

However, many of the traditional wastewater treatment processes are energy- or resource-intensive.

Powdered Chlorella vulgaris biomass was treated with hydrothermal treatment (Hydrothermal Liquefaction, HTL) in a reactor between 40-350 o C at holding times of 30 and 60 min.

The vapour pressure developed in the reactor were calculated with the Clausics-Clapeyron equation and with some realistic assumptions.

Microalgae can efficiently remove nitrogen and phosphorus from wastewaters.

Apart from enhancing wastewater treatment efficiency, the microalgae-based treatment systems were developed to promote microalgal growth as the produced microalgal biomass can be used in the production of e.g. Various kinds of wastewaters are produced in large quantities due to urbanization, industrialization and population growth.Aqueous phase reforming (APR) of powdered Chlorella vulgaris biomass was done at the University of Zaragoza, Spain to produce hydrogen with or without Ni catalyst with two pressure 30 or 35 bars at 227 o C.The maximum H2 yield was 0.427 x 10-3 and 0.542 x 10-3 moles of H2 per 3 g of dry algal biomass, with Ni as catalyst at both pressure conditions.These advantages should scale with production volumes.HTL and APR offer similar advantages for processing wet feedstock’s, eliminating drying requirements altogether.This thesis investigates and compares different oil extraction methods and tries to fill the research gaps in the oil extraction processing, for example, utilising new techniques such as ultrasonic or microwave assisted solvent extraction.A detailed energy analysis for the extraction processes was conducted for each method to investigate the process feasibility to produce biodiesel more economically.The bio-oil content yield was found higher at 350 o C with 30 as compared to 60 min holding times and the GC-MS analysis showed the presence of fatty acids (C14-C18).The aqueous phase contained TOC, TN and TP, which are useful nutrients for microalgae cultivation.The de-oiled cake and in-situ cake were torrefied (slow pyrolysis) to convert the residue into a high energy density solid bio-char, which can be used as a feedstock to produce heat energy.Microalgae can be used as a source of biofuel and food supplements, however, their exploitation is lacking due to various bottlenecks including realistic processing options at scale.

SHOW COMMENTS

Comments Thesis On Microalgae

  • Microalgae An Alternative Source of Renewable Energy
    Reply

    Microalgae An Alternative Source of Renewable Energy A. Z. A. Saifullah, Md. Abdul Karim, Aznijar Ahmad-Yazid Department of Mechanical Engineering, IUBAT – International University of Business Agriculture and Technology, Dhaka 1230, Bangladesh Department of Mechanical Engineering, IUBAT – International University of Business Agriculture and…

  • Mathilde Andersson - Lund University
    Reply

    Food vs fuel. Algae-based biofuels refer to those produced from microalgae biomass. Microalgae –those focused upon in this review- are the oldest living micro-organisms on earth. The real value of microalgae lies in their oil content and the possibility to convert it into biodiesel.…

  • Hydrothermal processing of microalgae - White Rose eTheses Online
    Reply

    Microalgae contain large amounts of lipids and have faster growth rates than terrestrial biomass. One of the current technological bottlenecks of biofuels conversion is the economic extraction and processing of microalgae components. Due to their aquatic nature microalgae contain large amounts of water when harvested.…

  • Final Degree Project
    Reply

    The use of microalgae as a source of biofuels is an attractive proposition from the point of view that microalgae are photosynthetic renewable resources. They produce oils with high lipid content, have fast growth rates and are capable of growth in saline waters which are unsuitable for agriculture.…

  • CHARACTERIZING MICROALGAE Nannochloris oculata HARVESTING BY ALUMINUM.
    Reply

    Conductivity. This thesis reviews challenges of harvesting and concentration of green microalgae and examines the effect of pH, flocculant dosage, and culture conductivity on charge neutralization and flocculation of Nannochloris oculata by aluminum chloride.…

  • Dry Weight and Cell Density of Individual Algal and Cyanobacterial.
    Reply

    A Thesis presented to. Microalgae and cyanobacteria are the only known organisms that are capable of both oxygenic photosynthesis and hydrogen production. Thus.…

  • EVALUATING ALGAL GROWTH AT DIFFERENT TEMPERATURES - University of Kentucky
    Reply

    EVALUATING ALGAL GROWTH AT DIFFERENT TEMPERATURES Keelin Owen Cassidy University of Kentucky, [email protected] click to open a feedback form in a new tab to let us know how this document benefits you. This Master's Thesis is brought to you for free and open access by the Biosystems and Agricultural Engineering at UKnowledge.…

  • AN INVESTIGATION ON THE CO- PRODUCTION OF BIODIESEL AND METHANE FROM.
    Reply

    This work presented in this thesis could provide a basis for further research in the areas of biodiesel production from microalgae using the in-situ process and methane production from the microalgae residues, post transesterification. Parts of this thesis have been published in academic peer reviewed journals and…

  • Bioactivity and Applications of Sulphated Polysaccharides from Marine.
    Reply

    Marine microalgae have been used for a long time as food for humans, such as Arthrospira formerly, Spirulina, and for animals in biomass of these microalgae and the compounds they produce have been shown to possess several biological applications with numerous health benefits.…

The Latest from strahuemvseh.ru ©